Double-disk drill.



No. 736,369. v PATENTED AUG. 18, 1903. W. A. DYNES Kz J. M. PIERCE.

DOUBLE DISK DRILL.

APPLICATION 11.21) MAY 9, 1903.

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No. 736,369. PATENTED AUG. 18, 1903. W. A. DYNES & J. M. PIERCE.

DOUBLE DISK DRILL.

APPLICATION FILED MAY 9. 1902.

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UNITED STATES it Patented August 18, 1903.

PATENT OFFICE.

WILLIAM A. DYNES AND JAMES M. PIERCE, OF OWATONNA, MINNESOTA;

SAII) PIERCE ASSIGNOR TO SAID DYNES.

DOUBLE-DISK DRILL.

SPEGIFIGAIIOH forming part of Letters Patent N o. 736,,369, dated August 18, 1903. Application filed May 9,1903. Serial No. 156.389. (No modehl T aZZ whom it mayconcern:

Be it known that we, WILLIAM A. DYNES and JAMES M. PIERCE, of Owatonna, in the county of Steele, State of Minnesota, have invented certain new and useful Improvements in Double-Disk Drills, of .which the following is a specification.

The object of our invention is to provide a double-disk drill which will make two distinct furrows in the soil with a little ridge between them, and thereby effect a more uniform and wider distribution of the grain;

A further object is to provide a double disk drill which will not become clogged in grassy or wet soil.

A further object is to provide a disk drill that is simple in construction, and hence economical to manufacture, and that will be strong and durable and of light draft.

The invention consists generally in providing a wheel-colter in advance of each pair of disks, the forward edges of the disks lapping past the rear edge of the colter, which lies between them.

Further, the invention consists in providing an improved cleaning device between the pair of disks.

Further, the invention consists in various constructions and combinations, all as hereinafter described, andparticularly pointed out in the claims.

In the accompanying drawings, forming.

part of this specification, Figure 1 is a side elevation of a pair of drill-disks and the boot with our invention applied thereto. Fig. 2 is a plan view of the same. Fig. 3 is a rear view. Fig. 4 is an enlarged detail section. Fig. 5is a section on the line 0c 00 of Fig. 4. Fig. 6 is an enlarged detail of the cleaning devices provided between the rear edges of the disks.

a In the drawings, 2 represents a boot of the usual construction, having cone-bearings 3 for the drill-disks 4, which, as usual in drills of this type, arearranged obliquely with respect to one another, converging from their rear toward-their forward edges. The disks areheld in place by a bolt5 or other suitable The forward edges of the disks cooperate to a make a furrow in the soil wherein the seed is dropped through the boot, and as it is desirable to make as wide and uniform a distribution of the seed as possible we provide a colter 6 in advance of the drill-disks, mounted in bearings 7 in the drag-bars 8, that are secured at their rear ends to the boot and at their forward ends to the frame of the machine in the usual manner.

We prefer to make the colter of greater diameter than the disks 4 and mount it in the drag-bars so that its lower edge will be below the lower edges of the disks and will therefore dig deeper into the soil. We do not Wish, however, to confine ourselves either to the size shown of the colter or the disks, as the same may be varied at will.

The colter traveling in advance of the drilldisks will make a single furrow in the'soil and the disks following thereafter will make two distinct furrows in the furrow made by the colter, and as the furrows are made by the disks a little ridge of earth willbe pressed up between them, separating one furrow from the other, so that when the drill has passed along the grain will appear in two rows, separated by the middle ridge of earth in the bottom of the furrow made by the colter. The grain will thus be more evenly distributed through the soil and will grow and yield better than where it lies in one row in the bottom of a single furrow.

The colter traveling in advance of the disks will cut the grass, sticks, and roots and lumps of earth that would tend to clog the disks and interfere with their successful operation. The edge of the colter will also act as a cleaner to keep the edges of the disks on the inside terial that would prevent them from entering the soil. The edges of the disks will in turn keep the edge of the colter clean. found that this arrangement of the disks will act very effectually to keepthe colter clean, and the. colter in turn will keep the inner faces of the disks clean, so that except in a wet soil it will not be necessary to provide any other cleaning device for the disks.

It frequently happens that the drill is used in a wet soil or on land where a portion is 100 'free from accumulations of mud or other ma- 4 NVe have muddy, and we therefore prefer to provide cleaning devices located above the rear edges of the disks and supported, preferably, upon the boot. The cleaning devices that we employ consist of arms 9, loosely mounted on a bushing 10, that is supported by aheaded bolt 11, fitting within a socket in said boot. These arms are similar in construction, and each of them is preferably provided with a plate 12, that is adapted to bear upon the outer face of the adjacent disk, and each arm also carries a plate 13, that bears on the inner face of the opposite disk to that on which the other plate on the same arm bears. A spring 14, connecting said arms, tends to draw their cleanerplates against the surfaces of the disks. The cleaner-plates bear with sufficient pressure on the disks to scrape off mud or other accumulations thereon and yield sufficiently to accommodate themselves to any inequalities that may exist in the surface of the disks or variation in their angle of adjustment.

WVe claim as our invention- 1. The combination,with a drill-boot, of the disks mounted thereon and having converging forward edges, and a wheelcolter arranged in advance of said disks, for the purpose specified.

2. The combination,with a drill-boot, of the disks mounted thereon and converging from the rear toward the front, and a wheel-colter provided in advance of said disks and having its rear edge inserted between them, for the purpose specified.

3. The combination,with a drill-boot, of the disks mounted thereon and having contiguous forward edges, and a wheel-colter provided in advance of said disks with its rear edge inserted between them and arranged to clean theirinner faces, and the edges of said disks lapping past the edge of said colter and acting as cleaners therefor, substantially as described.

4. The combination,with a boot,of the disks mounted thereon, cleaning devices pivoted on said boot, each cleaning device arranged to engage the outer surface of one disk and the inner surface of the other,and means for holding said devices against said surfaces with a yielding pressure.

5. The con1bination,with a boot,of the disks mounted thereon, cleanerplates having a common pivot and arranged to engage respectively the outer face or surface of one disk and the inner surface of the other, and a spring for yieldingly holding said plates against said surfaces.

6. The combination, with a boot having a threaded hole, of a bolt having a threaded end to enter said hole, cleaner-arms having holes to receive the shank of said bolt and a bushing fitting within the holes in said arms and bearing at one end upon said boot and engaged at its other end by the head of said bolt.

7. The combination, with a drill-boot, of a disk mounted thereon and a wheel-colter arranged in advance of said disk and having its rear edge lapping by and acting as a cleaner for the forwarded ge of said disk,substantially as described.

8. A revolving disk, in combination with a wheel-colter arranged in advance of said disk and having its rear edge lapping by and acting as a cleaner for the forward edge of said disk.

In witness whereof we have hereunto set our hands this 20th day of April, 1903.

, WILLIAM A. DYNES.

JAMES M. PIERCE. In presence of RICHARD PAUL, S. V. GRIFFIN. 

